Battery device and electric equipment

Abstract

The utility model provides a battery device and electric equipment, and is applied to the technical field of batteries, the battery device comprises at least one battery monomer group, and each battery monomer group comprises a plurality of battery monomers arranged along a first direction; the plurality of sampling elements are respectively arranged on the corresponding single batteries and are used for acquiring information of the single batteries; the signal transmission line is in wireless communication connection with the plurality of sampling elements and is used for transmitting information acquired by the sampling elements; wherein the signal transmission line comprises a plurality of connecting parts and at least one redundancy part, the plurality of connecting parts are respectively connected with the plurality of single batteries, and the redundancy part is connected with two adjacent connecting parts; or the signal transmission line is movably connected with the plurality of single batteries. In the implementation process, the redundant part and the movable connection mode are both used for absorbing the deformation caused by the expansion of the battery monomers, so that the deformation of the signal transmission line can be reduced when the battery monomers are expanded, and the signal acquisition quality is further improved.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device and an electrical appliance. Background Technology

[0002] Energy conservation and emission reduction are key to sustainable development, which in turn promotes the adjustment of the energy structure and drives the development and application of battery technology. The key to the development of battery technology lies in electrochemical energy storage technology. Due to its advantages such as high energy density, good cycle capability, high operating voltage, environmental friendliness, and low self-discharge, it has been widely used in portable electronics, electric vehicles, and energy storage systems.

[0003] Battery systems require the collection of battery data from battery cells during operation to monitor the battery's operating status. Existing battery systems collect this data using sampling elements and then transmit it via near-field communication (NFC) to a signal transmission line. However, prolonged use of this NFC solution can lead to problems such as signal transmission line distortion and breakage, which in turn affects the quality of data transmission. Utility Model Content

[0004] The purpose of this application is to provide a battery device and electrical equipment to solve the technical problem that the signal transmission line will be twisted or broken when using the above-mentioned near-field communication scheme for a long time, which will affect the quality of data transmission.

[0005] In a first aspect, embodiments of this application provide a battery device, comprising: at least one battery cell group, each battery cell group including a plurality of battery cells arranged along a first direction; a plurality of sampling elements, respectively disposed on corresponding battery cells, for collecting information of the battery cells; and a signal transmission line wirelessly connected to the plurality of sampling elements for transmitting the information collected by the sampling elements; wherein the signal transmission line includes a plurality of connecting portions and at least one redundant portion, the plurality of connecting portions being respectively connected to the plurality of battery cells, and the redundant portion connecting two adjacent connecting portions; or, the signal transmission line being movably connected to the plurality of battery cells.

[0006] In the above implementation process, sampling elements can be set on individual battery cells, and the overall signal is collected through a signal transmission line wirelessly connected to multiple sampling elements. Simultaneously, the signal transmission line can include at least one redundant component, or the signal transmission line can be movably connected to multiple battery cells. The redundant component and the movably connected configuration are both used to absorb the deformation caused by the expansion of the battery cells, thereby reducing the deformation of the signal transmission line when the battery cells expand, and thus improving the signal acquisition quality and reliability.

[0007] Optionally, a redundant portion is provided between each pair of adjacent connection portions. In the above implementation, by providing a redundant portion between each pair of adjacent connection portions, the redundant portions can be evenly distributed, thereby uniformly absorbing the deformation caused by the expansion of individual battery cells, and thus reducing the deformation of signal transmission lines at each location.

[0008] Optionally, the battery cell includes an assembly, which includes a snap-fit ​​portion and a carrier portion: the snap-fit ​​portion is used to snap the connecting portion; the carrier portion is used to carry the sampling element. In the above implementation, the sampling element can be mounted on the battery cell via the carrier portion of the assembly, and the signal transmission line can be mounted on the battery cell via the snap-fit ​​portion of the assembly. This allows the signal transmission line to wirelessly connect with the sampling element for collecting information from the battery cell. Compared with the prior art of collecting battery cell information via FPC and wiring harness, the battery device provided in this application embodiment can improve the reliability of signal acquisition.

[0009] Optionally, the snap-fit ​​portion has a hole or slot, and the connecting portion is interference-fitted with the hole or slot. In the above implementation, the signal transmission line can pass through the hole or slot on the snap-fit ​​portion and be interference-fitted with it to be fixed to the assembly, thereby ensuring that the distance between the signal transmission line and the sampling element is within the range for wireless communication, and reducing signal transmission instability caused by movement of the signal transmission line, thus improving the reliability of signal acquisition.

[0010] Optionally, the signal transmission line is bonded to the sampling element. In the above implementation, the signal transmission line can be fixed to the sampling element by bonding, thereby ensuring that the distance between the signal transmission line and the sampling element is within the range where wireless communication is possible, and reducing signal transmission instability caused by movement of the signal transmission line, thus improving the reliability of signal acquisition.

[0011] Optionally, the battery cell further includes: a housing, the housing including a terminal wall, wherein the terminal wall is used to house the positive terminal and / or the negative terminal; the sampling element is fixed to the terminal wall. In the above implementation, since the distance between the terminal wall and at least one terminal is relatively short, fixing the sampling element to the terminal wall facilitates improving the efficiency of the sampling element in collecting information from the battery cell.

[0012] Optionally, the plurality of sampling elements are arranged in a row along the first direction. In the above implementation, arranging the plurality of sampling elements in a row along the first direction facilitates improving the transmission efficiency of the signal transmission line in transmitting information from multiple battery cells.

[0013] Optionally, the signal transmission line is positioned close to the plurality of sampling elements; viewed along a direction perpendicular to the plane containing the electrode wall, the redundant portion at least partially overlaps with the gap between two adjacent battery cells. In this implementation, positioning the signal transmission line close to the plurality of sampling elements improves the reliability of signal acquisition; simultaneously, positioning the redundant portion in the gap between two adjacent battery cells reduces the impact of movement of the redundant portion due to battery cell expansion on signal acquisition quality, thereby improving the reliability of signal acquisition.

[0014] Optionally, the plurality of battery cells include a plurality of first battery cells and a plurality of second battery cells, which are alternately arranged along the first direction; the plurality of sampling elements include a plurality of first sampling elements and second sampling elements, where the first sampling elements are disposed on corresponding first battery cells and the second sampling elements are disposed on corresponding second battery cells; two signal transmission lines are provided, where a plurality of connection portions of one signal transmission line are respectively connected to the assemblies corresponding to the plurality of first sampling elements, and a plurality of connection portions of the other signal transmission line are respectively connected to the assemblies corresponding to the plurality of second sampling elements. In the above implementation, the alternating arrangement of the first and second battery cells along the first direction improves the energy density of the battery device by regularly arranging the battery cells to accommodate a larger number of battery cells in a limited space; simultaneously, by providing two signal transmission lines, which are respectively connected to the assemblies corresponding to the first and second sampling elements, the routing efficiency of the signal transmission lines is improved, thereby reducing the complexity of the wiring harness of the signal transmission line arrangement.

[0015] Optionally, when viewed along the first direction, the first sampling element and the second sampling element do not overlap at least partially. In the above implementation, by alternating the sampling elements disposed on two adjacent battery cells, the interference between the two sampling elements during signal transmission is reduced, thereby improving the reliability of signal acquisition.

[0016] Optionally, the signal transmission line is positioned close to the plurality of sampling elements. Viewed along a direction perpendicular to the plane of the electrode wall, the redundant portion of the signal transmission line connected to the first sampling element at least partially overlaps with the second battery cell, and the redundant portion of the signal transmission line connected to the second sampling element at least partially overlaps with the first battery cell. In this implementation, the signal transmission line's proximity to the plurality of sampling elements improves the reliability of signal acquisition. Simultaneously, the partial overlap of the redundant portion of the signal transmission line connected to the first sampling element with the second battery cell reduces the impact of movement of the redundant portion caused by the expansion of the first battery cell on the quality of information acquired from the first battery cell. Similarly, the partial overlap of the redundant portion of the signal transmission line connected to the second sampling element with the first battery cell reduces the impact of movement of the redundant portion caused by the expansion of the second battery cell on the quality of information acquired from the second battery cell, thereby improving the reliability of signal acquisition.

[0017] Secondly, embodiments of this application provide an electrical device, which includes a battery device as described in any one of the first aspects.

[0018] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of a battery device provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of a battery cell pack provided in an embodiment of this application;

[0022] Figure 3 A cross-sectional view of a signal transmission line provided in an embodiment of this application;

[0023] Figure 4 This is a partial schematic diagram of a signal transmission line provided in an embodiment of this application;

[0024] Figure 5This is a schematic diagram of another battery cell pack provided in an embodiment of this application.

[0025] Icons: 10-Battery unit; 100-Battery cell pack; 110-Battery cell; 111-Snap-on part; 200-Sampling element; 300-Signal transmission line; 310-Connector; 320-Redundancy part; 301-Wire; 302-Protective component; 303-Connecting material. Detailed Implementation

[0026] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0028] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0031] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0032] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0033] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0034] Currently, judging from market trends, the application of batteries is becoming increasingly widespread. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of the application areas of power batteries, the market demand for them is also constantly increasing.

[0035] Existing battery management systems (BMS) are divided into integrated and distributed types. Both schemes monitor the battery cells through cell monitoring circuits. The battery cells can transmit monitoring signals to the cell monitoring circuits for acquisition via flexible printed circuit boards and wiring harnesses. However, in the above-mentioned schemes of existing technology, the deformation caused by cell expansion can stretch the wiring harness, leading to wiring harness crossings or other deformations, resulting in poor signal acquisition quality.

[0036] Based on the above considerations, in order to solve the problem of poor signal acquisition quality caused by cell expansion, this application provides a battery cell assembly and battery device to achieve a signal collection scheme for wireless sampling of battery cells. A sampling element is disposed on the surface of the battery cell, and the overall signal is collected through a signal transmission line wirelessly connected to the sampling element. Simultaneously, a redundant part is provided on the signal transmission line, or the signal transmission line is movably connected to the battery cell. This ensures that when the battery cell expands, the upper part of the signal transmission line can absorb the deformation through the redundant part or the movably connected connection, preventing deformation of the signal transmission line and thus improving the signal acquisition quality.

[0037] It is understood that the battery device provided in this application embodiment can be used, but is not limited to, in electrical equipment such as vehicles, ships, or aircraft; the aforementioned electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0038] The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells, which are connected in series, parallel, or mixed connections via a busbar. In some applications, a battery cell is also referred to as a battery cell.

[0039] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells; as an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells into a single module. As an example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0040] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0041] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0042] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0043] As an example, a battery cell can be a secondary battery, which refers to a battery cell that can be recharged after being discharged to activate the active materials and continue to be used.

[0044] The battery cell may be, but is not limited to, lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc.

[0045] As an example, a battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries.

[0046] The battery device provided in the embodiments of this application will be described in detail below. Please refer to... Figures 1-5 , Figure 1 This is a schematic diagram of a battery device provided in an embodiment of this application. Figure 2 This is a schematic diagram of a battery cell pack provided in an embodiment of this application. Figure 3 This is a cross-sectional view of a signal transmission line provided in an embodiment of this application. Figure 4 This is a partial schematic diagram of a signal transmission line provided in an embodiment of this application. Figure 5 This is a schematic diagram of another battery cell pack provided in an embodiment of this application.

[0047] like Figure 1 As shown, the battery device 10 provided in this application embodiment may include: at least one battery cell group 100, a plurality of sampling elements 200 and a signal transmission line 300.

[0048] Specifically, this application embodiment does not specifically limit the number of battery cell groups 100 included in the battery device 10. The battery device 10 may include one or more battery cell groups 100, such as... Figure 1 The battery device 10 shown includes two battery cell groups 100, which are arranged along a second direction Y.

[0049] The following section will first introduce the scheme in which the above-mentioned battery cell pack 100 includes a single battery cell 110.

[0050] The battery device 10 described above includes a battery cell group 100 that may include a plurality of battery cells 110 arranged along a first direction X. The plurality of battery cells 110 may be alternately arranged along the first direction X (e.g., ...). Figure 1 (as shown), or, multiple battery cells 110 can also be arranged in the same direction along the first direction X (e.g. Figure 2 (As shown).

[0051] This application embodiment does not specifically limit the number of sampling elements 200 included in the battery device 10 described above. The number of sampling elements 200 is the same as the number of battery cells 110, for example: Figure 1 As shown, the battery device 10 includes 16 battery cells 110, and the battery device 10 also includes 16 sampling elements 200.

[0052] The aforementioned sampling elements 200 are respectively disposed on the corresponding battery cells 110 for collecting information from the battery cells 110. In one embodiment, the first end of the sampling element 200 can be connected to the positive terminal of the battery cell 110, and the second end can be connected to the negative terminal of the battery cell 110, thereby enabling the collection of information from the battery cells 110.

[0053] In this embodiment, the location of the sampling element 200 on each battery cell 110 is not specifically limited. For example, the sampling element 200 can be located on the terminal wall used for setting the terminal post, or it can be located on a wall other than the terminal wall. It is understood that the location of the sampling element 200 on each battery cell 110 can be the same or different.

[0054] In one implementation, the sampling element 200 may include a sampling module and a wireless communication module. The sampling module is used to collect information of the battery cell 110; the wireless communication module is used to receive the information of the battery cell 110 sent by the sampling module and send the information of the battery cell 110 to the signal transmission line 300 via wireless communication.

[0055] The sampling module and wireless communication module can be mounted on the same printed circuit board (PCB) or on separate PCBs. When mounted on different PCBs, they can be connected via board-to-board connectors. Alternatively, the sampling module and wireless communication module can be integrated into the same chip.

[0056] The aforementioned signal transmission line 300 is wirelessly connected to multiple sampling elements 200 for transmitting information collected by the sampling elements 200. This application embodiment does not specifically limit the location of the signal transmission line 300; for example, the signal transmission line 300 may be located directly above the sampling element 200, or it may be located to the side of the sampling element.

[0057] In one embodiment, the signal transmission line 300 may include a protective element 302 and a conductor 301. The protective element 302 wraps around the conductor 301 to protect it and to shape and limit its movement. Alternatively, the signal transmission line 300 may include only one conductor 301, in which case the protective element 302 can wrap around that conductor 301; or, the signal transmission line 300 may include multiple conductors 301 forming a bundle, in which case the protective element 302 can wrap around each conductor 301, and the conductors 301 are connected by a connecting material 303. Figure 3 As shown, or, the aforementioned protective element 302 may be wrapped around the outside of multiple conductors 301.

[0058] The aforementioned protective component 302 can be a light-cured adhesive tape or a wire trough, and the aforementioned connecting material 303 can be a terminal block, solder, or a connector.

[0059] This application does not limit the specific implementation of the above-mentioned wireless communication in the embodiments. Those skilled in the art can make appropriate selections according to the actual situation, such as Near Field Communication (NFC), Bluetooth communication, WIFI communication, etc.

[0060] Taking the connection between the signal transmission line 300 and multiple sampling elements 200 via NFC as an example, an onboard antenna can be provided on the sampling element 200. The onboard antenna and the signal transmission line 300 realize NFC mainly based on the principle of electromagnetic induction: the onboard antenna can emit or receive changing electromagnetic fields. In near-field communication, when current flows through the onboard antenna, a magnetic field is generated around the onboard antenna. The nearby signal transmission line 300 is within this magnetic field range. The change in the magnetic field will induce an electromotive force in the signal transmission line 300, thereby realizing the transmission of signals.

[0061] The battery device 10 provided in this application embodiment may include one or more signal transmission lines 300. When the battery device 10 includes one signal transmission line 300, such as Figure 2 As shown, the signal transmission line 300 is wirelessly connected to all sampling elements 200 of the battery device 10, thereby transmitting information from all battery cells 110 in the battery device 10. When the battery device 10 includes multiple signal transmission lines 300, such as Figure 2 As shown, each signal transmission line 300 is wirelessly connected to a portion of the sampling elements 200 in the battery device 10, thereby transmitting information of a portion of the battery cells 110 in the battery device 10.

[0062] The following describes the scheme in which the above-mentioned battery cell pack 100 includes multiple battery cells 110.

[0063] Each battery cell group 100 included in the aforementioned battery device 10 may include a plurality of battery cells 110 arranged along the first direction X. Similar to a battery cell group 100 including only one battery cell 110, the plurality of battery cells 110 in each battery cell group 100 may be alternately arranged along the first direction X (e.g., ...). Figure 1 (as shown), or, multiple battery cells 110 in each battery cell group 100 can also be arranged in the same direction along the first direction X (e.g. Figure 2 (As shown). It is understood that the battery cells 110 included in different battery cell groups 100 can be arranged in the same, partially the same or completely different manner; the first direction X corresponding to different battery cell groups 100 can be the same or different.

[0064] The implementation of the sampling unit when the battery cell pack 100 includes multiple battery cells 110 is the same as the implementation of the sampling unit when the battery cell pack 100 includes a single battery cell 110, and will not be described again here.

[0065] The battery device 10 provided in this application embodiment may include one or more signal transmission lines 300. When the battery device 10 includes one signal transmission line 300, the signal transmission lines 300 included in each battery cell group 100 are connected, thereby transmitting information of all battery cells 110 in the battery device 10. When the battery device 10 includes multiple signal transmission lines 300, each battery cell group 100 may include one or more signal transmission lines 300, thereby transmitting information of all or some of the battery cells 110 in the corresponding battery cell group 100.

[0066] It is understandable that when multiple battery cells 110 share a single signal transmission line 300, the signal transmission line 300 can collect information corresponding to multiple battery cells 110; when the signal transmission line 300 of a certain battery cell 110 is independent, the signal transmission line 300 can collect information corresponding to its corresponding battery cell 110.

[0067] To further address the problem of the battery cell 110 expanding and pulling on the signal transmission line 300 based on the aforementioned battery device 10, this application provides two implementation methods. The first implementation method is that the signal transmission line 300 includes multiple connecting portions 310 and at least one redundant portion 320; the second implementation method is that the signal transmission line 300 is movably connected to multiple battery cells 110. The two implementation methods are described below.

[0068] The first embodiment is described below. The signal transmission line 300 can be divided into two parts: a connecting part 310 and a redundancy part 320. The multiple connecting parts 310 can be connected to multiple battery cells 110 respectively, thereby fixing the signal transmission line 300 to the battery cells 110 to facilitate the transmission of information from the battery cells 110. The redundancy part 320 connects two adjacent connecting parts 310 and absorbs the expansion caused by the expansion of the battery cells 110, thereby reducing the pulling force on the signal transmission line 300.

[0069] It is understood that the aforementioned connection portion 310 refers to the part of the signal transmission line 300 whose length is the same as the length of the position where the signal transmission line 300 is located, and the aforementioned redundancy portion 320 refers to the part of the signal transmission line 300 whose length is greater than the length of the position where the signal transmission line 300 is located. Wherein, for example... Figure 4As shown, the signal transmission line 300 between the two redundant parts 320 may include one or more connecting parts 310. That is, there may be a redundant part 320 between every two adjacent connecting parts 310, or there may be no redundant part 320. This application embodiment does not make specific limitations on this.

[0070] The length of the signal transmission line 300 in the aforementioned redundant portion 320 is greater than the length of the position where the signal transmission line 300 is located. This application embodiment does not specifically limit the specific implementation of the aforementioned redundant portion 320. For example, only the length of the signal transmission line 300 in the aforementioned redundant portion 320 can be increased (e.g., reserving a length of approximately 8 mm, 10 mm, or 12 mm), without limiting its redundant shape, such as... Figure 4 As shown; or, the redundant part 320 can be implemented by means of curved wiring; or, spring wires 301 or the like can be used directly at the redundant part 320.

[0071] In one implementation, the redundant parts 320 can be evenly distributed. For example, a redundant part 320 can be provided between each pair of adjacent connecting parts 310; or, a redundant part 320 can be provided between the first connecting part 310 and the second connecting part 310, between the third connecting part 310 and the fourth connecting part 310, between the fifth connecting part 310 and the sixth connecting part 310, and so on. In another implementation, the redundant parts 320 can also be unevenly distributed. For example, a redundant part 320 can be provided between the first connecting part 310 and the second connecting part 310, between the third connecting part 310 and the fourth connecting part 310, between the sixth connecting part 310 and the seventh connecting part 310, between the tenth connecting part 310 and the eleventh connecting part 310, and so on.

[0072] The second implementation method is then introduced, in which the signal transmission line 300 can be movably connected to multiple battery cells 110. It is understood that the signal transmission line 300 can be movably connected to all battery cells 110 in the battery device 10, or the signal transmission line 300 can be movably connected to some of the battery cells 110 in the battery device 10. Specifically, when the battery device 10 includes multiple battery cell groups 100, the signal transmission line 300 is movably connected to at least one battery cell 110 in each battery cell group 100.

[0073] This application does not specifically limit the specific implementation of the above-mentioned active connection. For example, the signal transmission line 300 can be connected to the battery cell 110 through a flexible material, such as a spring or rubber; or, the battery cell 110 can be provided with a hole or groove, and the signal transmission line 300 can pass through the hole or groove; or, the signal transmission line 300 can be connected to the battery cell 110 through a universal joint.

[0074] In the above implementation process, sampling elements 200 can be provided on the battery cell 110, and the overall signal is collected through a signal transmission line 300 wirelessly connected to multiple sampling elements 200. Simultaneously, the signal transmission line 300 may include at least one redundancy unit 320, or the signal transmission line 300 may be movably connected to multiple battery cells 110. The redundancy unit 320 and the movably connected configuration are both used to absorb the deformation caused by the expansion of the battery cell 110, thereby reducing the deformation of the signal transmission line 300 when the battery cell 110 expands, and thus improving the signal acquisition quality and reliability.

[0075] Based on the above embodiments, a redundant part 320 may be provided between each pair of adjacent connecting parts 310.

[0076] Specifically, since each connection part 310 is connected to its corresponding battery cell 110, the redundancy part 320 is provided between every two adjacent connection parts 310. When multiple battery cells 110 are arranged in the same direction, the redundancy part 320 can be considered to be provided between two adjacent battery cells 110. When multiple battery cells 110 are arranged alternately, the redundancy part 320 corresponding to a certain battery cell 110 can be considered to be provided on the battery cell 110 adjacent to that battery cell 110.

[0077] In the above implementation process, by providing a redundant part 320 between each pair of adjacent connection parts 310, the redundant part 320 can be uniformly arranged, thereby using the redundant part 320 to uniformly absorb the deformation caused by the expansion of each battery cell 110, thereby reducing the deformation of each signal transmission line 300.

[0078] Based on the above embodiments, the battery cell 110 may include an assembly, which may include a snap-fit ​​portion 111 and a carrier portion. The snap-fit ​​portion 111 is used to snap onto the connecting portion 310, and the carrier portion is used to carry the sampling element 200.

[0079] Specifically, this application does not limit the specific implementation of the above-mentioned snap-fit ​​connection part 310. For example, the connection part 310 can be snapped in place using a claw; or, the connection part 310 can be snapped in place using a convex-concave fit, etc. Taking the claw as an example, the claw can have a slight interference fit with the connection part 310, and a material with a certain degree of elasticity (such as nylon, rubber, etc.) is used to reduce damage to the signal transmission line 300.

[0080] The embodiments of this application do not specifically limit the specific implementation of the above-mentioned sampling element 200. For example, the sampling element 200 can be fixed on the battery cell 110 by using a slot, bracket, etc.; or, the sampling element 200 can be fixed on the battery cell 110 by hot pressing welding, etc.

[0081] In the above implementation process, the sampling element 200 can be mounted on the battery cell 110 via the carrier portion in the assembly, and the signal transmission line 300 can be mounted on the battery cell 110 via the snap-fit ​​portion 111 in the assembly. Thus, the signal transmission line 300 can wirelessly connect with the sampling element 200 to collect information from the battery cell 110. Compared with the prior art of collecting information from the battery cell 110 via FPC and wiring harness, the battery device 10 provided in this application embodiment can improve the reliability of signal acquisition.

[0082] Based on the above embodiments, the snap-fit ​​portion 111 has a hole or groove, and the connecting portion 310 is interference-fitted with the hole or groove.

[0083] Specifically, an interference fit means that the outer dimension of the internal object is larger than the inner dimension of the external object, and a certain pressure needs to be applied during assembly to complete the fit. In the embodiments of this application, an interference fit means that the size of the connecting part 310 of the signal transmission line 300 is larger than the size of the hole or slot on the snap-fit ​​part 111, so that the signal transmission line 300 can be fixed on the battery cell 110.

[0084] In the battery device 10, the snap-fit ​​portions 111 of different battery cells 110 may all have holes, or the snap-fit ​​portions 111 of different battery cells 110 may all have grooves, or the snap-fit ​​portions 111 of different battery cells 110 may have some holes and some grooves.

[0085] In the above implementation process, the signal transmission line 300 can pass through the hole or slot on the snap-fit ​​part 111 and be interference-fitted with the hole or slot to be fixed on the above-mentioned assembly, thereby ensuring that the distance between the signal transmission line 300 and the sampling element 200 is within the range where wireless communication can be performed, and reducing the instability of signal transmission caused by the movement of the signal transmission line 300, thereby improving the reliability of signal acquisition.

[0086] Based on the above embodiment, the signal transmission line 300 is attached to the sampling element 200.

[0087] Specifically, this application does not limit the specific implementation of the signal transmission line 300 being bonded to the sampling element 200. For example, the signal transmission line 300 and the sampling element 200 may be soldered together; or the signal transmission line 300 and the sampling element 200 may be crimped together; or the signal transmission line 300 and the sampling element 200 may be bonded together with an adhesive, etc.

[0088] The signal transmission line 300 and the sampling element 200 do not need to be in contact; that is, there is a certain distance between the signal transmission line 300 and the sampling element 200, such as 200 mm, 180 mm, 150 mm, etc.

[0089] In the above implementation process, the signal transmission line 300 can be fixed to the sampling element 200 by adhesive bonding, thereby ensuring that the distance between the signal transmission line 300 and the sampling element 200 is within the range where wireless communication is possible, and reducing the instability of signal transmission caused by the movement of the signal transmission line 300, thereby improving the reliability of signal acquisition.

[0090] Based on the above embodiments, the battery cell 110 may further include: a housing, the housing including an electrode post wall, and the sampling element 200 fixed to the electrode post wall.

[0091] Specifically, the terminal wall is used to house the positive and / or negative terminals of the battery cell 110. The positive and negative terminals of the battery cell 110 can be simultaneously located on the terminal wall; or, the positive terminal of the battery cell 110 can be located on the terminal wall, while the negative terminal of the battery cell 110 can be located on a non-terminal wall; or, the negative terminal of the battery cell 110 can be located on the terminal wall, while the positive terminal of the battery cell 110 can be located on a non-terminal wall.

[0092] It is understandable that the aforementioned pole wall can be the top cover of the battery cell 110.

[0093] Taking the 110 prismatic battery cell as an example, such as Figure 1 or Figure 2 As shown, both the positive and negative terminals of the battery cell 110 are disposed on the terminal wall. In this case, the sampling element 200 can be located between the positive and negative terminals. Taking a cylindrical battery cell 110 as another example... Figure 5 As shown, the positive and negative terminals of the battery cell 110 are positioned opposite each other, and the terminal wall is on the side of the battery cell 110. At this time, the sampling element 200 can also be located between the positive and negative terminals.

[0094] In the above implementation process, since the distance between the electrode wall and at least one electrode is relatively close, the sampling element 200 is fixed on the electrode wall, which facilitates the improvement of the sampling element 200's efficiency in collecting information from the battery cell 110.

[0095] Based on the above embodiments, multiple sampling elements 200 are arranged in a row along the first direction X.

[0096] Specifically, such as Figure 2 As shown, all sampling elements 200 included in each battery cell group 100 can be arranged in a single column along the first direction X; or, the sampling elements 200 included in each battery cell group 100 can also be arranged in multiple columns along the first direction X, such as... Figure 1 or Figure 5 As shown, the sampling elements 200 included in each battery cell group 100 can also be arranged in two columns along the first direction X.

[0097] When the sampling elements 200 included in each battery cell group 100 can also be arranged in two columns along the first direction X, in one embodiment, each column of the multiple sampling elements 200 can be provided with a signal transmission line 300, and the number of signal transmission lines 300 is the same as the number of columns; in another embodiment, the signal transmission lines 300 provided in each column of the multiple sampling elements 200 can be the same signal transmission line 300, and the number of signal transmission lines 300 is 1; in yet another embodiment, the signal transmission lines 300 provided in some columns of the multiple sampling elements 200 are the same signal transmission line 300, and the signal transmission lines 300 provided in the remaining columns are different signal transmission lines 300, and the number of signal lines 300 is 2.

[0098] In the above implementation process, multiple sampling elements 200 are arranged in a row along the first direction X, which facilitates the improvement of the transmission efficiency of the signal transmission line 300 in transmitting information from multiple battery cells 110.

[0099] Based on the above embodiments, such as Figure 2 or Figure 5 As shown, the signal transmission line 300 is positioned close to multiple sampling elements 200; when viewed along a direction perpendicular to the plane of the electrode wall, the redundant part 320 at least partially overlaps with the gap between two adjacent battery cells 110.

[0100] Specifically, the signal transmission line 300 being positioned close to the sampling element 200 means that the distance between the signal transmission line 300 and the sampling element 200 is less than a threshold. In this embodiment, the size of the threshold is not specifically limited, such as 200 mm, 160 mm, 100 mm, etc.

[0101] When viewed along a plane perpendicular to the pole wall, the redundant part 320 on the signal transmission line 300 at least partially overlaps with the gap between two adjacent battery cells 110; thus, the redundant part 320 is not directly disposed on the battery cell 110, and when the redundant part 320 moves, the impact on the information acquisition of the battery cell 110 can be reduced.

[0102] In the above implementation process, the signal transmission line is close to multiple sampling elements 200, which can improve the reliability of signal acquisition; at the same time, the redundancy part 320 is set in the gap between two adjacent battery cells 110, which can reduce the impact of the movement of the redundancy part 320 caused by the expansion of the battery cell 110 on the signal acquisition quality, thereby improving the reliability of signal acquisition.

[0103] Based on the above embodiments, such as Figure 1 As shown, the plurality of battery cells 110 includes a plurality of first battery cells 110 and a plurality of second battery cells 110, and the first battery cells 110 and the second battery cells 110 are alternately arranged along a first direction X; the plurality of sampling elements 200 includes a plurality of first sampling elements 200 and second sampling elements 200, the first sampling elements 200 are disposed on the corresponding first battery cells 110, and the second sampling elements 200 are disposed on the corresponding second battery cells 110.

[0104] Specifically, when the first battery cell 110 and the second battery cell 110 are alternately arranged along the first direction X, the first sampling element 200 on the first battery cell 110 and the second sampling element 200 on the second battery cell 110 can be arranged in a row along the first direction X.

[0105] In one implementation, a signal transmission line 300 may be provided, and a plurality of connection portions 310 of the signal transmission line 300 are respectively connected to the assemblies corresponding to the plurality of first sampling elements 200 and the assemblies corresponding to the second sampling elements 200, and the plurality of connection portions 310 of the signal transmission line 300 are alternately connected to the assemblies corresponding to the first sampling elements 200 and the assemblies corresponding to the second sampling elements 200.

[0106] In another implementation, two signal transmission lines 300 may be provided, wherein a plurality of connection portions 310 of one signal transmission line 300 are respectively connected to the assemblies corresponding to a plurality of first sampling elements 200, and a plurality of connection portions 310 of the other signal transmission line 300 are respectively connected to the assemblies corresponding to a plurality of second sampling elements 200.

[0107] When the first battery cell 110 and the second battery cell 110 are alternately arranged along the first direction X, the first sampling element 200 on the first battery cell 110 and the second sampling element 200 on the second battery cell 110 can also be arranged in two columns along the first direction X, wherein the first sampling element is arranged in one column and the second sampling element 200 is arranged in another column.

[0108] In one embodiment, two signal transmission lines 300 may be provided, wherein multiple connection portions 310 of one signal transmission line 300 are respectively connected to the assemblies corresponding to multiple first sampling elements 200, and multiple connection portions 310 of the other signal transmission line 300 are respectively connected to the assemblies corresponding to multiple second sampling elements 200.

[0109] In one implementation, a signal transmission line 300 may be provided, and the multiple connecting portions 310 of the signal transmission line 300 are respectively connected to the assemblies corresponding to the multiple first sampling elements 200 and the assemblies corresponding to the second sampling elements 200. The multiple connecting portions 310 of the signal transmission line 300 are sequentially connected to the assemblies corresponding to the first sampling elements 200, and then sequentially connected to the assemblies corresponding to the second sampling elements 200.

[0110] In the above implementation process, the first battery cell 110 and the second battery cell 110 are alternately arranged along the first direction X. By regularly arranging the battery cells 110, a larger number of battery cells 110 can be arranged in a limited space, thereby improving the energy density of the battery device 10. At the same time, by setting two signal transmission lines 300, which are respectively connected to the assembly corresponding to the first sampling element 200 and the assembly corresponding to the second sampling element 200, the routing efficiency of the signal transmission lines 300 is improved, thereby reducing the complexity of the wiring harness of the signal transmission lines 300.

[0111] Based on the above embodiments, when viewed along the first direction X, the first sampling element 200 and the second sampling element 200 do not overlap at least partially.

[0112] Specifically, the first sampling element 200 and the second sampling element 200 do not overlap at least partially, that is, the first sampling element 200 on the first battery cell 110 and the second sampling element 200 on the second battery cell 110 are arranged in two columns along the first direction X, wherein the first sampling element is arranged in one column and the second sampling element 200 is arranged in another column.

[0113] In one embodiment, two signal transmission lines 300 may be provided, wherein multiple connection portions 310 of one signal transmission line 300 are respectively connected to the assemblies corresponding to multiple first sampling elements 200, and multiple connection portions 310 of the other signal transmission line 300 are respectively connected to the assemblies corresponding to multiple second sampling elements 200.

[0114] In one implementation, a signal transmission line 300 may be provided, and the multiple connecting portions 310 of the signal transmission line 300 are respectively connected to the assemblies corresponding to the multiple first sampling elements 200 and the assemblies corresponding to the second sampling elements 200. The multiple connecting portions 310 of the signal transmission line 300 are sequentially connected to the assemblies corresponding to the first sampling elements 200, and then sequentially connected to the assemblies corresponding to the second sampling elements 200.

[0115] In the above implementation process, by alternating the sampling elements 200 set on two adjacent battery cells 110, the interference between the two sampling elements 200 during signal transmission is reduced, thereby improving the reliability of signal acquisition.

[0116] Based on the above embodiment, the signal transmission line 300 is disposed close to the plurality of sampling elements 200; when viewed along the direction perpendicular to the plane where the electrode wall is located, the redundant portion 320 of the signal transmission line 300 connected to the first sampling element 200 at least partially overlaps with the second battery cell 110, and the redundant portion 320 of the signal transmission line 300 connected to the second sampling element 200 at least partially overlaps with the first battery cell 110.

[0117] Specifically, the signal transmission line 300 being positioned close to the sampling element 200 means that the distance between the signal transmission line 300 and the sampling element 200 is less than a threshold. In this embodiment, the size of the threshold is not specifically limited, such as 200 mm, 160 mm, 100 mm, etc.

[0118] When viewed along a direction perpendicular to the plane of the electrode wall, the redundant portion 320 of the signal transmission line 300 connected to the first sampling element 200 at least partially overlaps with the second battery cell 110; thus, the redundant portion 320 of the signal transmission line 300 connected to the first sampling element 200 is not directly disposed on the first battery cell 110, and when the redundant portion 320 moves, the impact on the information acquisition of the first battery cell 110 can be reduced.

[0119] Similarly, when viewed along a direction perpendicular to the plane of the electrode wall, the redundant portion 320 of the signal transmission line 300 connected to the second sampling element 200 at least partially overlaps with the first battery cell 110; thus, the redundant portion 320 of the signal transmission line 300 connected to the second sampling element 200 is not directly disposed on the first battery cell 110, and when the redundant portion 320 moves, the impact on the information acquisition of the second battery cell 110 can be reduced.

[0120] In the above implementation process, the signal transmission line is close to multiple sampling elements 200, which can improve the reliability of signal acquisition. At the same time, the redundant part 320 of the signal transmission line 300 connecting the first sampling element 200 partially overlaps with the second battery cell 110, which can reduce the impact of the movement of the redundant part 320 caused by the expansion of the first battery cell 110 on the quality of information acquired from the first battery cell 110. Similarly, the redundant part 320 of the signal transmission line 300 connecting the second sampling element 200 partially overlaps with the first battery cell 110, which can reduce the impact of the movement of the redundant part 320 caused by the expansion of the second battery cell 110 on the quality of information acquired from the second battery cell 110, thereby improving the reliability of signal acquisition.

[0121] In summary, this application provides a battery device 10, which can provide sampling elements 200 on battery cells 110. The overall signal is collected through a signal transmission line 300 wirelessly connected to multiple sampling elements 200. The signal transmission line 300 can include at least one redundancy unit 320, or it can be movably connected to multiple battery cells 110. The redundancy unit 320 and the movably connected configuration are both used to absorb the deformation caused by the expansion of the battery cells 110, thereby reducing the deformation of the signal transmission line 300 when the battery cells 110 expand, and thus improving the signal acquisition quality and reliability.

[0122] This application embodiment also provides an electrical device, which includes the battery device 10 described in the above embodiment, and the battery device 10 is used to provide electrical energy to the electrical device.

[0123] The electrical equipment can include, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0124] For ease of explanation, this application uses a vehicle as an example of an electrical device. The vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 10 is installed inside the vehicle. The battery device 10 can be located at the bottom, front, or rear of the vehicle. The battery device 10 can be used to power the vehicle; for example, it can serve as the vehicle's operating power source or general power source, such as for the vehicle's starting, navigation, and driving power needs.

[0125] The vehicle may also include a controller and a motor, the controller being used to control the battery unit 10 to power the motor, for example, for the power needs of starting, navigating and driving the vehicle.

[0126] In some embodiments of this application, the battery device 10 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0127] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: At least one battery cell group, each battery cell group comprising a plurality of battery cells arranged along a first direction; Multiple sampling elements are respectively set on the corresponding battery cell to collect information of the battery cell; A signal transmission line is wirelessly connected to multiple sampling elements for transmitting information collected by the sampling elements; The signal transmission line includes multiple connecting parts and at least one redundant part. The multiple connecting parts are respectively connected to multiple battery cells, and the redundant part is connected to two adjacent connecting parts; or, the signal transmission line is movably connected to multiple battery cells.

2. The battery device according to claim 1, characterized in that, In the case where the signal transmission line includes multiple connecting parts and at least one redundant part, the redundant part is provided between every two adjacent connecting parts.

3. The battery device according to claim 1, characterized in that, The battery cell includes an assembly, which includes a snap-fit ​​portion and a support portion. The snap-fit ​​part is used to snap the connecting part; The support portion is used to support the sampling element.

4. The battery device according to claim 3, characterized in that, The snap-fit ​​portion has a hole or groove, and the connecting portion is interference-fitted with the hole or groove.

5. The battery device according to claim 1, characterized in that, The signal transmission line is attached to the sampling element.

6. The battery device according to any one of claims 1-5, characterized in that, The battery cell also includes: The housing includes a pole wall, wherein the pole wall is used to provide a positive terminal and / or a negative terminal; The sampling element is fixed to the pole wall.

7. The battery device according to claim 6, characterized in that, The plurality of the sampling elements are arranged in a row along the first direction.

8. The battery device according to claim 7, characterized in that, When the signal transmission line includes multiple connecting parts and at least one redundant part, the signal transmission line is disposed close to the multiple sampling elements; Viewed along a direction perpendicular to the plane of the electrode wall, the redundant portion at least partially overlaps with the gap between two adjacent battery cells.

9. The battery device according to claim 6, characterized in that, The plurality of battery cells include a plurality of first battery cells and a plurality of second battery cells, wherein the first battery cells and the second battery cells are alternately arranged along the first direction; The plurality of sampling elements includes a plurality of first sampling elements and second sampling elements, wherein the first sampling elements are disposed on the corresponding first battery cell, and the second sampling elements are disposed on the corresponding second battery cell; Two signal transmission lines are provided. One of the signal transmission lines has multiple connection points that are respectively connected to the assemblies corresponding to multiple first sampling elements, and the other of the signal transmission lines has multiple connection points that are respectively connected to the assemblies corresponding to multiple second sampling elements.

10. The battery device according to claim 9, characterized in that, When viewed along the first direction, the first sampling element and the second sampling element do not overlap at least partially.

11. The battery device according to claim 9, characterized in that, When the signal transmission line includes multiple connecting parts and at least one redundant part, the signal transmission line is disposed close to the multiple sampling elements; Viewed along a direction perpendicular to the plane containing the electrode wall, the redundant portion of the signal transmission line connected to the first sampling element at least partially overlaps with the second battery cell, and the redundant portion of the signal transmission line connected to the second sampling element at least partially overlaps with the first battery cell.

12. An electrical appliance, characterized in that, The electrical equipment includes the battery device as described in any one of claims 1-11.

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